Title:
METHOD FOR PRODUCING ELECTROLYTE SOLUTION FOR REDOX FLOW BATTERIES USING INCINERATION ASH AS RAW MATERIAL
Document Type and Number:
WIPO Patent Application WO/2020/138083
Kind Code:
A1
Abstract:
Provided is a method for producing an electrolyte solution for redox flow batteries using incineration ash as a raw material, whereby it becomes possible to collect high-purity vanadium easily and with high efficiency to produce an electrolyte solution. The method comprises: a first step of adding an aqueous alkaline solution to incineration ash to perform the alkaline extraction of a vanadium-containing metal compound; a second step of separating the reaction product produced in the first step into a first filtrate and a first filtrated solid material; a third step of adding an alkaline earth metal salt to the first filtrate to convert a compound composed of an alkali metal and vanadium in the first filtrate to a compound composed of an alkaline earth metal and vanadium; a fourth step of separating the metal conversion product into a second filtrate and a second filtrated solid material while washing the metal conversion product with water; a fifth step of adding a reducing agent and an acid to the second filtrated solid material that contains a compound composed of the alkaline earth metal and vanadium to perform a dissolution/reduction reaction; and a sixth step of separating a reaction solution produced in the fifth step into a third filtrate containing a vanadium acidic solution as the main component and a third filtrated solid material containing the alkaline earth metal salt as the main component.
Inventors:
KUBATA MICHIRU (JP)
SEKINE RYOJUN (JP)
TANAKA YASUNORI (JP)
KAWAMOTO ISSEI (JP)
ZHANG YUANYUE (JP)
JIN KOICHI (JP)
SEKINE RYOJUN (JP)
TANAKA YASUNORI (JP)
KAWAMOTO ISSEI (JP)
ZHANG YUANYUE (JP)
JIN KOICHI (JP)
Application Number:
PCT/JP2019/050604
Publication Date:
July 02, 2020
Filing Date:
December 24, 2019
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
REMATEC HOLDINGS CORP (JP)
REMATEC HOLDINGS CORP (JP)
International Classes:
C22B3/06; B09B3/00; C22B3/12; C22B3/22; C22B3/44; C22B7/02; C22B34/22; H01M8/02; H01M8/18
Domestic Patent References:
| WO2017208471A1 | 2017-12-07 |
Foreign References:
| JP3917222B2 | 2007-05-23 |
Attorney, Agent or Firm:
SAEGUSA & PARTNERS (JP)
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